Question

29. A body needs a force F, just to start motion on a
surface, a force F, to continue its motion and a
force Fz to roll on the surface. What is (i) the static
friction (ii) sliding friction and (iii) rolling
friction ? State whether F, is equal, less than or
greater than (i) F, and (ii) F​

Answer 1

Answer:

1. F

1

= Static friction

2. F

2

= Sliding friction

3. F

3

= Rolling friction

F

1

>F

2

>F

3

F

2

is less than F

1

but greater than F

3

.